big jon downrigger risers

[salmonquest]

I recently purchased two big jon 12" risers to mount my down riggers on. I am planning on backing these with steel and through bolting the whole thing. i would like to also use the big john swivel bases. My question is should put the swivel bases on top or bottom. The main bar on the riser is rectangular. I am worried if I mount the swivel on top and angle the downrigger it would put torque diagonaly and lead to twisting. If I mount the swivel base on the bottom the tension would always be supported by the longer side of the riser bar, but it would put a lot of torque on the swivel base. Any suggestions would be very welcome.

[Priority1]

I'd put the swivel base on top. If you put it on the bottom the riser would add leverage and put more strain on the swivel bases. The swivel base belongs right under the rigger.